This is a Notable Operational milestone.
Piloted by Major T H Bane. The duration of the flight was 1 min 42 secs and reached a height of about 6 ft.
To see a video of the de Bothezat helicopter in flight click on this link.
(Source: History of Air Force Development of Rotary Wing Aircraft, Journal of The American Helicopter Society, Vol. 1, No. 1, January 1956, Page 78)